#!/bin/bash

AUTHOR="alexises"
YEAR=$(date +%Y)

# $1: author
# $2: year
# $3: file path
function put_license () {
	author="$1"
	year="$2"
	file="$3"	

	cat - "$file" <<EOF >"$file.tmp"
/*
 * $file
 * Copyright (C) $year $author
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
EOF

	mv "$file.tmp" "$file"
}

# $1: file
function has_license () {
	grep -q "^ \* Copyright (C)" "$1" && echo 1 || echo 0
}

for file in $(find . -name "*c" -o -name "*.h"); do
	[ $(has_license $file) -ne 1 ] && put_license "$AUTHOR" $YEAR $file
done

